The ESP Report Server started task is generating excessive output in STDOUT output, causing the JES2 spool to fill up.
How to spin STDOUT output in Report Server STC?
Component: ESP Workload Automation Report Server
Release: ALL
Use SPIN parm on STDOUT, like:
//STDOUT DD SYSOUT=A,SPIN=(UNALLOC,5K)
Another option is to issue JES2 command $T with SPIN[,DDname=jxxxxxxx], see link below for more detail:
$T Job - Change a job's class, scheduling priority, or affinity
See related IBM JES manuals.